Symptoms of hemoptysis include chest tightness, dyspnea, sedentary breathing, and a stupefied appearance. Symptoms vary from patient to patient depending on the individual. Hemoptysis is bleeding in the lungs or trachea that is coughed up through the airway. Hemoptysis with a volume of more than 200 ml in a single episode or more than 500 ml in a 24-hour period is called massive hemoptysis. Common causes include tracheobronchitis, various types of pneumonia, tuberculosis, lung cancer and other diseases. In addition, the use of anticoagulant drugs and severe injuries can also cause hemoptysis. Before hemoptysis, chest tightness and shortness of breath, dyspnea, chest collapse, skin cyanosis and other clinical manifestations will suddenly appear, and in severe cases, inhalation will be accompanied by three concave signs, decreased breath sounds, and even fainting. If you find the above symptoms, you should call the emergency telephone for help, do not overwork in daily life, adjust the mood, and actively treat the primary disease.